The world is at the brink of eradicating polio. A surprise polio outbreak in Israel in 2013 led researchers to look closely for the poliovirus in sewage to detect virus shed in the feces of non-paralyzed people infected with polio, what epidemiologists call the "silent circulation" of polio.
When storms like Hurricane Michael make landfall, the first things they hit often are barrier islands — thin ribbons of sand that line the US Atlantic and Gulf coasts. It’s hard to imagine how these narrow strips can withstand such forces, but in fact, many of them have buffered our shores for centuries.
Money for protecting the Brazilian Amazon is drying up, while big landowners along the region's "arc of deforestation" are pushing the government to ease up on regulations. Both spell disaster in the battle to preserve the world's largest tropical forest.
American James Allison and Japanese Tasuku Honjo won the 2018 Nobel Prize for Physiology or Medicine on Monday for game-changing discoveries about how to harness and manipulate the immune system to fight cancer.
The biggest test of how much a state governor can really lead on a global problem like climate change came this week as Gov. Jerry Brown convened the Global Climate Action Summit in San Francisco.
California has provided leadership amid the vacuum left when the US federal government reversed course on climate policy. But there are things a state just can’t do.